Tamping-machine.



G. E. NBILSEN.

TAMPING MACHINE.

APPLICATION FILED JAN.13, 1913.

Patented N0v.4, 1913.

2 SHEETS SHEET 1.

Lvjms5es nven/ or CharZeSlE. rleilsen C. E. NBILSEN. TAMPING MACHINE.APPLICATION TILED JAN.13, 1913. 1,077,544 Patented Nov. 4, 1913.

2 SHEETSSHEET 2.

F '38 ZUJfifHesse/s Inveh/ or Charles E. Y leiZSen,

UKTE STATES PATN FEFCE.

CHARLES E. NEILSEN, OF ST. PAUL, MINNESOTA, ASSIGNOR TO CLARENCE R.WILKINSON, OF ST. PAUL, MINNESOTA.

TAMPINGr-MACHINE.

To all whom it may concern.

Be it known that 1, CHARLES E. NEILsnN, a citizen of the United States,residing at St. Paul, in the county of Ramsey and State of Minnesota,have invented new and useful Improvements in Tamping-Machines, of whichthe following is a specification.

My invention relates to improvements in tamping machines of the class inwhich a plurality of vertically movable tamping bars, adapted to fall bygravity, are lifted by suitable mechanism and secured in elevatedpositions when inoperative.

The object of my invention is to provide a machine of this kind designedto minimize the impact and friction between the working parts thereof.

A further object is to provide improved means for operatively connectingthe tamping bars with or disconnecting the same from the liftingmechanism, and also to utilize said lifting mechanism as a trip torelease said bars from their elevated posi-v tions.

In the accompanying drawings, Figure 1 is a rear elevation of myimproved tamping machine; Fig. 2 is a side elevation of the same; Fig. 3is a detail sectional view taken on the line 33 of Fig. 2, and Fig. 4 isa detail sectional view taken on the line 44 of Fig. 2.

Referring to the accompanying drawings, I have used the referencenumeral 10 to indicate the frame, which may be supported upon suitablestandards or suspended from overhead, as shown in dotted lines in Figs.1 and 2. A pair of spaced angle bars 11, formed with notches 12 therein,are arranged at the base of the frame 10. Similar angle bars 13 are alsoarranged on the frame directly above the angle bars 11 in such positionthat their notches are in vertical alinement with the notches of saidangle bars 11. Upright tamping bars let, beveled at their edges, passthrough said notches. Rollers 15, mounted on each of said angle bars 11and 13, are formed to receive said beveled edges and furnish anefficient bearing for said tamping bars. These rollers are each mountedin a cage 16 formed with slots 17 to receive the pins 18 in said anglebars. Set nuts 19, threaded in said bars, are arranged to adjust thepositions of said cages whereby the roller Specification of LettersPatent.

Application filed January 13, 1913.

Patented Nov. 4, 1913.

Serial No. 741,893.

bearings may be moved to take up wear. Each tamping bar is provided atits base with a tamping head 20 adapted to pack material placed beneathit.

Mechanism for lifting the tamping bars 20 consists of a power shaft 21revoluble on the frame 10. This shaft is fitted with a power pulley 22and also with a cam arm 23 for each tamping bar. Lifting levers 24, eachformed with a bearing 25, at one end, are mounted on the stub shafts 26which are secured in the supports 27 at the rear of the frame, saidlevers being adapted to tilt vertically and horizontally on said stubshafts. The free end of each lever is pivotally attached to a connectingrod 28, which extends downward adjacent to the side of a tamping bar,and is then bent through the perforation 29 centrally arranged in thebar to the opposite side thereof, where it is pivotally attached to thepintle 30 having supports on said tamping bar. Rollers 31, formed withconcave peripheries are mounted on each lever 24, said rollers beingdesigned to be engaged by the faces of the cam arms 23, to lift saidlevers and raise the tamping bars and to be disengaged fro-m said armsto permit the fall of said tamping bars by gravity. Because of theconnection between the tamping bars 14 and the rods 28, just described,lifting force applied to said rods is exerted at the centers of the barsand substantially in a vertical direction. It will be noted that theconnecting rods 28 do not rest on center and as a result said connectingrods, together with their lifting levers 2 1, tend to tilt away fromtheir respective tamping bars. Guides 32 are arranged on the frame 10 tolimit this horizontal tilting movement of said levers and to direct thesame, as the tamping bars are lowered to position in which the rollers31 on said levers may be engaged by said cam arms.

Means are provided for securing the tamping bars in elevated,inoperative positions and for shifting the levers 2st to locate tilt toone side. A lug 35 and seat 36 are formed at the upper end of each dog.An operating bar 37, formed with elongated perforations 38 therein toreceive said dogs, is slidable upon the frame 10. This bar is connectedby the spring 39 to the frame 10, said spring being adapted toyieldingly act upon said slidable barto engage the lever 40, pivotallymounted thereon, with the frame 10. This lever, located as shown in Fig.1, allows movement of the bar 37 by the retraction of the spring 39, asseen in said figure, to permit the dogs 33 to tilt and when moveddownward at right angles to the position illustrated, shifts the baragainst the action of said spring to move and hold the dogs 33substantially upright.

In use, the cam arms 23 are rotated continupusly by any suitable sourceof power. hen the machine is not in operation, the levers 24 rest uponthe seats 36 of their respective dogs 33 and against their guides 32,thus securing the tamping bars in elevated positions and freeing therollers 31 from engagement with the cam arms 23. Nhen it is desired tocommence the operation of the machine, the lever l0 is shifted to movethe bar 37 and raise the upper ends of said dogs, whereby the levers 24are carried to positions locating their rollers 31 in the paths of theirrespective cam arms. These rollers are engaged by said cam arms neartheir ends and the levers 24 are lifted a short distance from the seats36 upon said dogs. hen said rollers 31 pass from the ends of the camarms 23, the levers 2st instantly tilt and, as they fall with thetamping bars 1 1-, cleartheir seats 36 011 the dogs During the downwardfall of the tamping bars 14, the levers 2d are directed by their guidebars 32 to again locate the rollers 31 in the paths of their cam arms.These rollers engage and follow the faces 23" to the ends of their camarms where they are released, thus raising the bars and then permittingthem to fall by gravity. This action is repeated until it is desired tostop the machine, when the lever 10 is shifted to the positionillustrated in Fig. 1. Upon this operation, the dogs are released fromtheir upright osition and are permitted to tilt against their respectivelevers. These levers are then lifted as before, above the seats 36 onthe dogs 33, in which position the lugs 35 on said dogs engage saidlevers. As the rollers 31 reach the ends of their cam arms and arereleased therefrom, the levers fall into position upon the seats oftheir respective dogs. Said levers and dogs then tilt, with the levers24: resting against the guides 32, thus holding the tamping bars 14elevated and inoperative.

Having described my invention, what I claim as new and desire to protectby Letters Patent, is:

1. In a device of the class described, the

combination of a frame, vertically movable tamping bars, on the frame,adapted to fall by gravity, a lever for each bar pivotally attached atone end to said frame and adapted to tilt vertically and horizontally, aconnecting rod between each tamping bar and lever, power driven armsadapted to engage said levers and raise said bars, dogs for engaging thelevers to secure the bars in elevatcd inoperative positions, said dogsbeing 1 also adapted to carry and locate th levers in positions to beengaged by said arms whereby th levers are disengaged from the dogs topermit the fall of the tamping bars.

2. In a device of the class described, the combination of a frame,vertically movable tamping bars on the frame adapted to fall by gravity,said bars being formed with a perforation centrally arranged therein,adjustable roller bearings for'said bars, lifting levers pivotallyattached to said frame and i adapted to tilt vertically and horizontallythereon, guides for said levers, a rod pivotally connecting each leverwith its respective tamping bar and extending at its lower end throughthe perforation 1n said bar, said lever and rod being adapted to tilt,rollers on said levers, power driven cam arms adapted to engage saidrollers and raise said bars, and dogs for engaging the levers to securethe tamping bars in elevated, inoperative positions, said bars beingalso adapted to carry and locate the levers in positions to be 1 engagedby said arms, whereby the levers are disengaged from the dogs to permitthe fall of the tamping bars.

3. In a device of the class described, the

combination of a frame, vertically movable tamping bars, on the frame,adapted to fall by gravity, a lever for each bar pivotally attached atone end to said frame and adapted to tilt vertically and horizontallythereon,

its

a connecting rod between each bar and lever,

said rods and levers being adapted to normally tilt, guides forsaidlevers, power driven cam arms adapted to move said levers and raisesaid bars, tilt-able dogs on the frame adapted to engage the levers andsecure the bars in elevated, inoperative positions, an operating bar forshifting said dogs to carry and locate the levers in positions to beengaged by said arms, whereby the levers are disen aged from the dogs topermit the fall of the tamping bars.

4-. In a device of the class described, the

combination of a frame, vertically movable driven arms adapted to engagesaid rollers and raise said bars, and tiltable dogs on the frame formedwith lugs and seats at their upper ends, said dogs being adapted tosecure the levers and bars in elevated, inoperative positions, anoperating bar for shifting said dogs to carry and locate the levers inpositions to be engaged by said cam arms, whereby the levers areunseated from the 10 dogs and removed therefrom to permit said levers toclear said dogs as the tamping bars fall.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES E. NEILSEN.

lVitnesses F. C. CASWELL, F. M. HARDY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

